<template>
  <div class="star" :class="'star-'+size">
<!--    v-for="(sc, index) in starClasses" :key="index" :class="sc"-->
    <span class="star-item" v-for="(sc, index) in starClasses" :key="index" :class="sc"></span>
  </div>
</template>

<script>
  const CLASS_ON = 'on';
  const CLASS_HALF = 'half';
  const CLASS_OFF = 'off';
  export default {
    name: '',
    props: {
      score: Number,
      size: Number
    },
    computed: {
      starClasses () {
        const {score} = this;
        const scs = [];
        //向scs中添加n个CLASS_ON
        const scoreInt = Math.floor(score);
        for (let i = 0; i < scoreInt; i++) {
          scs.push(CLASS_ON);
        }
        //向scs中添加0个或1个CLASS_HALF
        if ((score - scoreInt)*10 >= 5) {
          scs.push(CLASS_HALF);
        }
        //向scs中添加n个CLASS_OFF
        while(scs.length < 5){
          scs.push(CLASS_OFF);
        }
        return scs;
      }
    }
  }
</script>

<style scoped lang='stylus' ref='stylesheet/stylus'>
  @import '../../common/stylus/mixins.styl'
  .star //2x图 3x图
    float left
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px

        &:last-child
          margin-right: 0

        &.on
          bg-image('./images/star48_on')

        &.half
          bg-image('./images/star48_half')

        &.off
          bg-image('./images/star48_off')

    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px

        &:last-child
          margin-right 0

        &.on
          bg-image('./images/star36_on')

        &.half
          bg-image('./images/star36_half')

        &.off
          bg-image('./images/star36_off')

    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px

        &:last-child
          margin-right 0

        &.on
          bg-image('./images/star24_on')

        &.half
          bg-image('./images/star24_half')

        &.off
          bg-image('./images/star24_off')

</style>
